First off, let's get one thing straight.
Notepad is probably THE NUMBER ONE WORD PROCESSOR
-- in terms of features it DOES NOT have.
Your question is like, "How can I make my donkey run fast enough to achieve Escape Velocity?" Well, the simple answer is, "You can't." Not on planet Earth, anyway.
The way you handle the various lines looking professional is to put Paragraph tags around the whole mess. E.g.:
<p>This is my first paragraph, consisting of several lines.</p>
<p>This is my second paragraph, containing even more insightful commentary.</p>
Then, you just let the browser wrap the text where it may, and use CSS styling to control the spacing between paragraphs.
If you're having issues where need a limited width, such as a newspaper column, put those paragraphs inside a <div> tag, and set its width. E.g.:
<div style="width: 600px">
<p>pair of graphs</p>
<p>pair of graphs</p>
<p> et cetera </p>
</div>